KVM: MMU: invert return value of mmu.sync_page and *kvm_sync_page*
Return true if the page was synced (and the TLB must be flushed)
and false if the page was zapped.
Reviewed-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 88a1a79..1c87102 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1784,7 +1784,7 @@
static int nonpaging_sync_page(struct kvm_vcpu *vcpu,
struct kvm_mmu_page *sp)
{
- return 1;
+ return 0;
}
static void nonpaging_invlpg(struct kvm_vcpu *vcpu, gva_t gva)
@@ -1916,20 +1916,20 @@
if ((_sp)->role.direct || (_sp)->role.invalid) {} else
/* @sp->gfn should be write-protected at the call site */
-static int __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
- struct list_head *invalid_list)
+static bool __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
+ struct list_head *invalid_list)
{
if (sp->role.cr4_pae != !!is_pae(vcpu)) {
kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list);
- return 1;
+ return false;
}
- if (vcpu->arch.mmu.sync_page(vcpu, sp)) {
+ if (vcpu->arch.mmu.sync_page(vcpu, sp) == 0) {
kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list);
- return 1;
+ return false;
}
- return 0;
+ return true;
}
static void kvm_mmu_flush_or_zap(struct kvm_vcpu *vcpu,
@@ -1947,14 +1947,14 @@
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
}
-static int kvm_sync_page_transient(struct kvm_vcpu *vcpu,
- struct kvm_mmu_page *sp)
+static bool kvm_sync_page_transient(struct kvm_vcpu *vcpu,
+ struct kvm_mmu_page *sp)
{
LIST_HEAD(invalid_list);
int ret;
ret = __kvm_sync_page(vcpu, sp, &invalid_list);
- kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, !ret);
+ kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, ret);
return ret;
}
@@ -1966,7 +1966,7 @@
static void mmu_audit_disable(void) { }
#endif
-static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
+static bool kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
struct list_head *invalid_list)
{
kvm_unlink_unsync_page(vcpu->kvm, sp);
@@ -1985,8 +1985,7 @@
continue;
WARN_ON(s->role.level != PT_PAGE_TABLE_LEVEL);
- if (!kvm_sync_page(vcpu, s, &invalid_list))
- flush = true;
+ flush |= kvm_sync_page(vcpu, s, &invalid_list);
}
kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush);
@@ -2084,9 +2083,7 @@
kvm_flush_remote_tlbs(vcpu->kvm);
for_each_sp(pages, sp, parents, i) {
- if (!kvm_sync_page(vcpu, sp, &invalid_list))
- flush = true;
-
+ flush |= kvm_sync_page(vcpu, sp, &invalid_list);
mmu_pages_clear_parents(&parents);
}
kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush);
@@ -2145,7 +2142,7 @@
if (sp->role.word != role.word)
continue;
- if (sp->unsync && kvm_sync_page_transient(vcpu, sp))
+ if (sp->unsync && !kvm_sync_page_transient(vcpu, sp))
break;
if (sp->unsync_children)